Ferrell wasn't the only American celebrity to throw his support behind the U.S. soccer team. Wrestler Hulk Hogan also posted a video prior to the big game. "I guess all I have to say: USA is the greatest country in the world," Hogan said. "The USA men's soccer team is going to wipe out Germany, and by the way, what you going to do, Germany, when the men's USA soccer team runs wild on you?"

Who do you think will win today: USA or Germany?

If you're at work while the big game is going on, the U.S. team has drafted a letter you can give to your employer. See below: